Hmm, alright thanks, ill try this way then. 
The other thing i wanted to make is from one post i found that guy mentioned:
“You can implement a buffer within the Metasound that ensures only one firing sound is playing at a given time as it preloads the next one so that playback is smooth and continuous. You couldn’t do that with Sound Cues, so you’d end up with a bunch of them playing at once or very obvious stopping and starting of the sound effects.”
Which ill try to make it happen after using your suggested way, at worst case ill probably need to make sound same length as one shot of the gun.